New drilling technology implemented at ACG
bp, the operator of the Azeri-Chirag-deepwater Gunashli (ACG) field development, has successfully implemented multilateral well technology (Multilateral Well Technology, MLT), applying it for the first time at ACG.
This is stated in a message from bp Azerbaijan. It is noted that this has become an important step in efforts to maximize reserve recovery and maintain long-term production at one of the most mature assets in the Caspian region.
"The implementation of MLT makes it possible to solve the technical difficulties of drilling through the complex geological formations of ACG, as well as to overcome the growing limitations on the number of available slots on platforms. Thanks to the ability to create multiple branches from a single wellbore, multilateral wells are one of the most effective solutions for improving access to formations, increasing drainage efficiency, and maximizing the value of existing infrastructure.
The new technological approach is a key element of bp's broader strategy to manage production decline at ACG. It supports the sustainability of long-term production while optimizing capital expenditures. As ACG moves into a more complex and mature development phase, multilateral well technology is expected to play a critical role in engaging additional reserves and extending the economic life of the field," the message said.
The first multilateral well has already been successfully drilled from the West Azeri platform. The project demonstrated both the technical feasibility and the high value of this technology in the complex reservoir conditions of ACG: "The well was implemented with a high level of industrial safety and without incidents. The work was completed 30 days ahead of schedule, and the drilling and completion phases significantly exceeded the established timelines. This achievement was the result of careful planning, high quality of execution, and effective management of geological uncertainties. The project also demonstrated the successful integration of specialists in geology, drilling, and completions, showing how coordinated work can deliver both technical and commercial efficiency."
As part of the strategic implementation of the technology at ACG, bp plans an expanded program of multilateral well drilling across the field. It will begin with three MLT wells in 2026, including C44 and D41, which are to be brought into operation in the first half of the year. The long-term plan provides for drilling a number of additional multilateral wells at ACG assets in 2027–2028, underscoring the key role of the technology in securing future production at this field, the message said.
"Recognizing that no multilateral drilling solution can fully cover the full diversity of ACG reservoir conditions, the development strategy provides for selecting the optimal technological configuration for each target. This will ensure high efficiency in various geological conditions. To further increase the recovery factor, MLT technology will be combined with other modern solutions, including horizontal drilling, advanced geo-steering, and intelligent well completion systems such as sand control and inflow management," the message noted.
